Question

rehana has to fix a lace around a carpet. she bought a 50m roll of lace.How much lace will be used for 5 such carpets?how much lace will be left over?

Answer 1

Answer: Lace used is 20 m and leftover lace is 30 m.

Given:

Length of the carpet = 1 m and 50 cm = 1.5 m.

Breadth of the carpet = 50 cm = 0.5 cm.

Length of the lace roll = 50 m

Concept: Perimeter of a rectangle = 2 (length + breadth).

Perimeter of 1 carpet = 2 (1.5+0.5) = 4 m

Perimeter length of 5 carpets = Length of lace used = (5×4) m = 20 m.

Length of lace left over = 50 – 20 = 30 m.